Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); ++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void dfs2(int)’: user.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<gt[nod].size(); ++i) ~^~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:124:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(i=1; i<=n; ++i) ^~~ user.cpp:127:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ cout<<nr<<"\n"; ^~~~